// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

//
// System.Reflection.Emit/UnmanagedMarshal.cs
//
// Author:
//   Paolo Molaro (lupus@ximian.com)
//
// (C) 2001-2002 Ximian, Inc.  http://www.ximian.com
//

#if MONO_FEATURE_SRE
using System.Runtime.InteropServices;

namespace System.Reflection.Emit
{
    [StructLayout(LayoutKind.Sequential)]
    internal sealed class UnmanagedMarshal
    {
#pragma warning disable 169, 414
        private int count;
        private UnmanagedType t;
        private UnmanagedType tbase;
        private string? guid;
        private string? mcookie;
        private string? marshaltype;
        internal Type? marshaltyperef;
        private int param_num;
        private bool has_size;
#pragma warning restore 169, 414

        private UnmanagedMarshal(UnmanagedType maint, int cnt)
        {
            count = cnt;
            t = maint;
            tbase = maint;
        }
        private UnmanagedMarshal(UnmanagedType maint, UnmanagedType elemt)
        {
            count = 0;
            t = maint;
            tbase = elemt;
        }

        public static UnmanagedMarshal DefineByValArray(int elemCount)
        {
            return new UnmanagedMarshal(UnmanagedType.ByValArray, elemCount);
        }

        public static UnmanagedMarshal DefineByValTStr(int elemCount)
        {
            return new UnmanagedMarshal(UnmanagedType.ByValTStr, elemCount);
        }

        public static UnmanagedMarshal DefineLPArray(UnmanagedType elemType)
        {
            return new UnmanagedMarshal(UnmanagedType.LPArray, elemType);
        }
#if FEATURE_COMINTEROP
		public static UnmanagedMarshal DefineSafeArray( UnmanagedType elemType) {
			return new UnmanagedMarshal (UnmanagedType.SafeArray, elemType);
		}
#endif
        public static UnmanagedMarshal DefineUnmanagedMarshal(UnmanagedType unmanagedType)
        {
            return new UnmanagedMarshal(unmanagedType, unmanagedType);
        }
#if FEATURE_COMINTEROP
		internal static UnmanagedMarshal DefineCustom (Type typeref, string cookie, string mtype, Guid id) {
			UnmanagedMarshal res = new UnmanagedMarshal (UnmanagedType.CustomMarshaler, UnmanagedType.CustomMarshaler);
			res.mcookie = cookie;
			res.marshaltype = mtype;
			res.marshaltyperef = typeref;
			if (id == Guid.Empty)
				res.guid = String.Empty;
			else
				res.guid = id.ToString ();
			return res;
		}
#endif
        // sizeConst and sizeParamIndex can be -1 meaning they are not specified
        internal static UnmanagedMarshal DefineLPArrayInternal(UnmanagedType elemType, int sizeConst, int sizeParamIndex)
        {
            UnmanagedMarshal res = new UnmanagedMarshal(UnmanagedType.LPArray, elemType);
            res.count = sizeConst;
            res.param_num = sizeParamIndex;
            res.has_size = true;

            return res;
        }
    }
}
#endif
